The Pro D-pad is hardly a 7.5, and I'll show you why.
I'm pretty sure most of the people who say they haven't had issues haven't played games where frequent accidental diagonals are really noticeable during play. Stuff like Puyo Puyo Tetris, and sometimes BoTW.
It is way too easy to hit directions you aren't trying to hit on the Switch Pro Controller D-Pad. Anyone can replicate this - just go to test your buttons in the settings. Hit left or right with the tip of your finger, as far from the center of the D-Pad as possible, and apply the tiniest bit of pressure up or down - and you'll get an up or down input as well. The amount of pressure required is so tiny that unwanted inputs come from normal play.
I made two short videos demonstrating this.
- One video of me holding the DS4 in one hand and rocking my thumb back and forth on the DS4 D-Pad (which I don't even like). I've got my PS4 controller hooked up thru Steam, the D-pad set to 8-way (enabling diagonals) and the directions set to WSAD (for visibility thru notepad).
- One video of me doing the same with the Switch Pro controller using the OS-level button test feature.
The results kind of speak for themselves:
https://gfycat.com/gifs/detail/DeepWindingAnkole
https://gfycat.com/gifs/detail/TidyDefinitiveKillifish
and seeing the internals of the controller as well as the nature of the fix described in an earlier post are enough to tell me that that's a result of a poor D-Pad design as opposed to a manufacturing error that affects just 'some' controllers.